Lake County Indiana Zip Codes

Cities in

Below are a list of the cities located in Lake County, IN. There are 32 total unique zip codes in Lake County, Indiana. The time zone for Lake County is the Central Daylight Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for is 18089.

The population in Lake County, IN is currently 498,558. That is an increase of 0.40% vs the population of 496,005 in 2010.

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